SoftBank paid $265 million to acquire a 58.5 percent stake in GungHo. Puzzle & Dragons was the highest-grossing mobile game on both Android and iOS in February. This is largely due to its success in Japan. With its 10 million players, it’s possible that Puzzle & Dragons could become the first mobile game to earn $1 billion.

Puzzle & Dragons is a puzzle role-playing game that combines match-three mechanics with Pokémon style gameplay and art. It’s primarily responsible for pushing GungHo to the top of the highest-grossing developers list on Android and iOS (where it is No. 2).

GungHo fits with SoftBank’s recent ambitions to take the spot as Japan’s biggest mobile-Internet company. The corporation deals in broadband, media, marketing, and now … Puzzles & Dragons. SoftBank is targeting $10 billion in annual revenue.